Pipe-reamer.



WI T/VES 8E8 mac/0 mm,

,T. P SALLEY.

PIPE REAMER.

APPLICATION FILED SEPT. 28. [9!8.

Patented Mar. 25,1919.

HVVENTDR ATTORNEY nTE STATES PATENT onnron.

THOMAS P. SALLEY, 016 THE UNITED STATES NAVY.

PIPE-REAMER.

To all whom it may concern:

Be it known that I, THOMAS P. SALLEY, a

citizen of the United States, in the United States Navy, have invented a new and Improved Pipe-Reamer, of which the following is a full, clear, and exact description. This invention relates to tools or appliances for manipulating or operating upon metal pipes, and has particular reference to means for reaming the end of a pipe or cutting off the bur that is formed ordinarily in the end of a. pipe coincidentally with the operation of the pipe cutter.

Among theobjects of the invention is to provide, therefore, an appliance for the easy, rapid, and reliable reaming or beveling of the inner edge of the end of a metal pipe.

Another object of the invention is to provide an apparatus in the nature of an attachment for a standard type ofpipe stock employed forthe cuttin of a thread on the outside of the end of a pipe, said attachment providing a simple and efiective means for finishing the end of apipe ready for coupling and the passage therethrough of electric conductor wires or the like without obstruction.

A still further object is to provide a reaming or boring device comprising a shank having a positive feed, a boring chuck so connected to the shank as to be positively rotated thereby but being backed up by resilient means whereby the boring or reaming tool mayyield under excessive resistance even though the shank is fed forward positively. v

With the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which- Figure 1 is a vertical longitudinal section of my device in operative position with respect to the end of a pipe and a standard pine stock cooperating therewith; and

Fig. 2 is-a sectional detail on the broken line 2-2 of Fig. 1.

Referring now more particularly to the drawings, I show at 10 the end portion of a metal pipe of any size or construction upon Specification of Letters Patent.

Patented Mar. 25,1919.

Application filed September 28, 1918. Serial No. 256,042.

which is fitted or supported a thread cutting pipe stock including a body or holder 11 loosely surrounding the pipe but being slidably fitted thereon by means of a collar '12 to which the holder is connected by one or more set screws 13. This holder 11 in the type of pipe stock indicated carries a pluralityof thread cutting die members 14 each of which is held from displacement from the holder by means of a lag bolt 15 operating through a slot 16 in the die member and tapped into a hole 17 of the holder. The die members are actuated toward the axis of the pipe 10 for the formation of the thread thereon by means of set screws 18 tapped radially of the apparatus through lugs 19 constituting parts of the holder.

The parts thus far described are conventional and are referred to for the purpose of laying a basis for the specific description of the improvement that is shown as adapted for use in connection therewith. It is well known that in the cutting of a metal pipe, especially by means of a rotary pipe cutter, there is formed a pronounced bur or ragged edge on the inner surface of the pipe as a result of the cutting action. This bur is objectionable in any practice and especially so when the pipes are used as casings for electric conductors which must be projected through the pipes, an operation seriously hindered by any roughness or projections that may be found on the inner surfaces of the pipes. Furthermore even though the pipes may be cut with a hack saw which though it may leave only a slight bur will nevertheless leave a square shoulder which for the pur oses above indicated is better removed leaving a beveled edge at the end or joint of the pipe.

My reaming device that I employ for the reduction of the burred or square edge of the pipe comprises a bracket 20 having an internally threaded head or hub 21 at its outer end and having at the opposite ends of the two legs a pair of angularly formed feet 22 having slots or notches 22' whereby the feet are adapted to he slipped beneath the heads of the lag screws 15 whereby the bracket 20 is held in operative position with respect to the pipe stock. This bracket will be put in the place indicated at any time by slightly loosening the lag screws, or for some purposes the bracket may be retained on the pipe stock if desired as a permanent fixture.

23 indicates a tool shank having a threaded portion operating in the hub 21, the thread being extended far enough along the shank to accommodate an adjustable nut 24 serving when adjusted as a fixed anchorage or abutment for a cushion spring 25 surrounding the smooth end of the shank and projecting into oppositely arranged parallel slots 29 formed in the chuck. These slots'are long enough to allow the chuck to be moved toward the nut 24 against the force of the spring in the event of undue resistance being encountered by the reaming or boring tool indicate-d at 30 and suitably fixed in the end of the chuck remote from the shank.

With the parts arranged as indicated and with the die members 14 embracing the threaded end of the pipe the operation of the improved reamer may be briefly summarized as follows: The shank 28 being threaded in the hub 21 of the bracket 20 and the bracket being anchored as above described to the pipe stock, upon rotation of the shank 23 by any suitable means, as 'for example the handle 31, the thread "on the shank will cause apositive forward-feed of the shank and at the same time the cross pin 28 will positively rotate the chuck and the reaming tool 30. The cushion spring 25 will immediately insure the-entry ofithe point of the reamer into-the end of the pipe bringing the cutting edge or edges thereof into communication with the bur or sharp edge that may be formed thereon in the cutting operation. The strength-of the spring 25 is intended to besufficientto insure the reduction of the bur or sharp edge of the pipe while the shank isbeing rotated several times. The spring, however, is intended to yield so as to allow the chuck and tool to move relatively toward the nut 24 in case of excessive resistance being encountered. Obviously the adjustment of the abutment nut 24 will provide for the in-' crease or decrease of the effective force .of the spring 1n accordance with the character of the metal of the pipe or other conditions that may be encountered. In practice, however, the nut remains fixed upon the shank Copies of this patent may be obtained for and rotates therewith as well as moving longitudinally with the shank as a result of the rotation of the shank in the threaded hub. I a

I claim:

1. In a pipe reamer, the combinationof a bracket having a threaded hub in axial alinement with a pipe to be reamed, means to hold the bracket in operative position, a threaded shank rotatable in and -movable positively along said-hub, a cutting tool carried by the inner end of the shank, means to positively rotate the tool from the shank, and a cushion acting between the shank and the tool to permit the tool to yield under excessive pressure even though'the shank is,

driven positively forward.

2. The combination with a pipe stock and means to support the same upon the end of "I the pipe, of a pipe reamer cooperating w1th the pipe stock and comprising a bracket having an internally threaded hubin axial alinement with the pipe, a threaded shank rotatable in and movable positively coaxi- J ally along said hub toward the pipe, a reaming tool adjacent to the end of the pipe means to connect the tool to, the adjacent end of the shank whereby the tool is posltively' rotated with the shank, said tool con-' necting means being'slid'able endwise along the shank, and a cushion spring surrounding the shank and bearing against the-outer endof the tool connecting-means ,and'tend mg to prevent the movement of the .tool" relatively away from. the pipe, i 3. In a device of the character setifprth, the combination of a bracket comp rlsmg two legs having angularly disposed attach+ ment feet and also having at the end -re" mote from the feet an internally threaded hub, a shank having a thread extending along its major portion and cooperating with said hub, an abutment nut adjustable along the thread of the shank between the legs of the bracket, means to rotate the shank within the hub, a reaming tool, a slotted sleeve carried by the end of the shank remote from the hub and movable endwise thereon and to which said reaming tool is fixed, means to positively rotate the sleeve and tool with the rotation of the shank, and a coil spring surrounding the shank between the nut and the adjacent end ment of the sleeve relative to the shank.

THOMAS sALLE L five cents each, by addressing the Commissioner of Patents, I Washington, D. 0; I p

of'the sleeve to control the endwise move 

